Improvement in casting pipe



ALFRED BRADY, O

PATENT OFFICE.

NEV YORK, N. Y.

IMPROVEMENT IN CASTING PIPE.

Specification forming part of Letters Patent No. 30,044, dated September 18, 1860.

To all whom it may concern.;

Be it known that I, ALFRED BRADY, of the city, county, and State of New York, have invented a new and useful Improvement in Casting Pipe; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this speciiication, in whichv Figure l is a vertical longitudinal middle section through the flask, showing the hollow core-bar with my invention applied to it. Fig. 2 is an end View of the flask, showing one of the right angular brace-arms applied to the core-bar in two positions. Fig. 3 is a longitudinal section through a core-bar, showing the brace-stift`ening bar applied to it. Fig. 4t is an end view of Fig. 3.

Similar letters of reference indicate corresponding parts in the several gures.

This invention consists in applying to the ends of the hollow core-bar, either inside or outside ofthe flask, suitable levers and one or more brace-bars extending from the end of one lever to that of the other, by which means the levers may be made to act upon the core-bar so as to prevent it from springing while the pipe is being cast. Said arms or levers and bracerod are to be arranged and applied to the ends of the core-bar in the manner substantially as will be hereinafter described.

To enable those skilled in the art to understand and use my invention, I will proceed to describe its construction and operation.

A is the flask, formed and put together in the usual manner. It has a hole through each end, through which passes the core-bar B after the mold has been formed.

To form the mold the flask is divided and the lower half is inverted on aboard. Thehalfpattern is Jthen adjusted, and the sand, loam,

the., are put into this flask portion and tamped down in the usual manner. This portion of the dask is then turned over and the other half ofthe pattern placed on the first. A little parting-sand is then sprinkled over the surface of the sand in the lower half of the ask. The upper halt` of the flask is now lled with sand and tamped down, and the patterns are carefully run. The core-bar B is now introduced through the hole thus formed in the sand, as shown in Fig. l, suitable in-gates or holes for pouring in the metal and for the escape of air being made in the sand. The core-bar itself is filled with small perforations for the escape oi' air, as will be seen by reference to Figs. l and 2 of the drawings. This hollow metal core-bar B is now surrounded by a space the thickness of the pipe to be cast, which is lled up with the metal that forms the pipe. Previously to introducing the core-bar B into the flask its surface is covered with a coating of sand and loam in the manner well known to those familiar with the art of founding. The ends of the core-bar B project out a suitable distance from the ends of the iiask and receive the arms C C, which are attached securely to the core-bar at right angles to its axis. The arms Inay be as long or short as is found desirable. Then everything is ready, the two extreme ends of the arms G C are connected together by a strong iron brace, D, which may have a nut on one end to properly attach or detach it from the arms C C. The metal is now poured in and the pipe is cast.

Instead of securing the arm C to the corebar B, right-angular pieces C, as shown in Fig.

3, may be used, and in this case the core-bar 1 will be stiiened by the portions that enter the bar, which portions will bear down at their ends and upward at the ends of the pipe. Two arms, as shown in Fig. 2, may be used with two bracing-rods, which will greatly lessen the liability of the core-bar springing while the metal is being poured around it.

The set-screws a a, (shown in Figs. l and 2) are used to prevent the core-bar from springing. These are used instead of the arms C C. They are set up close to the heads of the lask.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The application of a counteracting force to the ends ot' the core-bar B in the casting of pipes or tubular work by means substantially as herein described, and for the purposes set forth.

ALFRED BRADY.

Vitnesses:

M. M. LIVINGSTON, L. V. BENDR. 

